Apparatus for



` No. 625,7". Patented Mayes, |399..

. N. STEVENS.

APPARATUS FOR APPLYITNG HEAT TOPAVEMENTS FR DISINFECTING UR'MELTINGSNOW.

' (Application led Feb. 24, 1899.) (No Model.) v3 S u- L .s l I@ :um

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, m. 625,7, Patented my 23; |899.

.1.. N. STEVENS. y

'Mmmmssrw Mmm@ HEM ,m PAVEMENT?, Fam m SWW.

VAppliemcn led Feb. 24, 1899.) (H0 Budel.) c

SINFECTING OR MELTING 3 Sheets-Sheet 2.

Patented may 23,' |899.

R. N. STEVENS. APPARATUS FOB APPLYING HEAT T0 PAVEMENTS FDR DISINFECTINGURMELTING snow. l (No Model.) Application md Feb. 24, 1599.)

a sheets-sheet a.

UNITED STATES ROBERT N. STEVENS,

PATENT OEETCE.

OF NEW YORK, N. Y.

APPARATUS FOR APPLYING HEAT TO PAVEMENTS FOR DISYINFECTING R MELTINGSNOW.

SPECIFICATION forming part of Letters Patent No. 625,71 1, `dated May23, 1899. Application tiled February 2.4, 1899. Serial No. 706.688. (Nomodel.)

-to Pavements for Disinfecting or Melting Snow, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same.

The present invention relates to that class of pavement-heating machineswhich can be' used for melting snow or destroying pathogenic animalgermsg'and the objectof the' present invention is to furnish improvedmeans for varying the internal capacity of the flame# 'box, fordirecting the :dame within the Iiamebox toward or from the pavement, forpre' venting the escape of the flame at the edges of the box, and forpreventing the radiation of heat from the top and sides of the box.

The drawings illustrate a machine embodying these improvements.

Figure lisa side elevation of the apparatus; Fig. 2, a view of the rearend of the box; Fig.

. l 3, a longitudinal section of the box upon line 3 3 in Fig. 2; Fig.4, the curtains for the rear end of the box; Fig; 5, a cross-section ofthe box on line 5 5 in Fig. l; Fig. 6, a front elevation of the machine;Fig.` 7, a plan of the machine 5 Fig. 8, a perspective view of one ofthe side curtains, and Fig. 9 a perspective view of the body or skeletonof the name-box without its attachments. l

The body is formed of vertical sides and ends A A', ystiiened at the topby a ange or angle-iron u, and braced across the top at the rear end bytwo cross-bars c. The box is carried by an axle B, supported by wheels Cin the rear of the box and connected tothe crossl bars a by side railsZ), having a handle c for moving the apparatus.

The roof of the dame-box is formed of a top plate A2, secured movablywith in the sides or body, so as to vary the internal height of the boxat pleasure. The top plafifeI is held adj ustably within the body bychains Z, hooked upon pins m, which are projected upwardly at intervalsfrom the iiange a upon the body,

but the top plate may be adjusted and` secured by any other suitablemeans.

The body A A is held by the side rails ant handle c a few inches abovethe pavement, and the sides and ends are provided with asbestos curtainsD,which sweep upon' the pavement aud conform to its inequalities, so asto retain thelame in the box. The sides and ends are provided with rowsof hooks e to sustain the curtains, and one of the side curtains isshown in Fig. 6 provided with two sets of eyelets d', either of which isadapted to engage the hooks e. fixed at different heights upon the bodyto conform to the inequalities of the ground or to compensate for wearupon their lower edges.

A platform b upon the rails b carries an oiltank E, and a series ofburners dis shown mounted at the rear end of the iiame-box to projectthe flame forwardly into the same. The rear end A' isl formed withnotches f to admit the flame, and the rear curtain (shown in Fig. 4) isformed with slots f for the same purpose.

' The so-called Wells burner is represented in Figs. l and 2,` whichburner has a rectangle f tubes, through which the fiame is projected tovaporize the oil before combustion.

The burners are represented in Fig. 1 suspended or projected from thelower side of a pipe G, which is arranged to rock in bearings g upon therear end A' of the flame-'box and is connected by hose g' and cock Gwith the tank E. By mounting the burners upon the swiveling tube G,which .supplies them with oil, they may be inclined toward the pavement,as shown in Fig. l, or toward the top plate A2, as shown in Fig. 3.

A series of apertures Il is formed in the front end of the body, and adamper-plate H is applied thereto for closing or opening the apertures,and a similar damper,` and series of apertures may be formed upon thetop plate near the front end of the flame-box, if desired.

It will be understood from the above de-` scription that the four sidesof the flame-box form a skeleton'body, which is fixed to the supportingcarriage or axle, so as to be sustained above the pavement, while thefire- The curtains may thus be;

proof curtains applied to the sides ofthe box .serve to make a contactwith the 'uneven sur- Y face of thepa'vement and to confine the flameinthe box far `lnore eiectually than'can bedone with sides of rigidmaterial.

A set-screw lo is shown in one of the bearings g to clamp theburner-supporting tube G when adjusted with the burners in thei properposition, and the burners may thus be directed downwardly when theapparatus is Iused' in melting ice, which requires the most'.-

direet application of the heat.

The adjustability of the top plate A2 permits the internal capacity ofthe lamelbox to be increased when the apparatus is used for meltingsnow, in which case the box is directed upwardly by the depression ofthe handle c and then pressed downwardly upon j the snow to be melted.

Where the apparatus is used for destroying when operating upon apavement of wood or asphaltum to prevent overheating the same. ln suchcase the adj nstability of the top plate Azpermitsv the lowering of thesame closeenough to the pavement to radiate heat ef fectively upon thelatter, vand the flame F is then directed upwardly, `as shown in Fig. 3,

to'heat the plate A for such'purpose and to avoid the impingement of thellame directly upon the pavement. To ntiliz'e the heat most effectivelyin thus sterilizing a pavement, I; prefer .to prevent radiation from thetop and` sides of the vllamebox by arranging an asbes` tos blanket Iover the entire llame-box, as

shown in Fig. 5 and as indicated by dotted'- lines I in Fig. 9. Suchasbestos blanket -retains the heat in the top plate A2 and sides A, andthus secures the radiation of the heat to the pavement with the leastpossible loss.

It is obvious that the asbestos'blanket perv forms the same function asthe asbestos curtains when placed over the flame-box and eX? tended downthe sides of the same into con tact with the uneven surface of thepave-4 ment, and it may therefore be used in place of the curtains toconfine the flame within' the flame-box when the' bottom of the flameboxdoes not conform with the pavement.

The essential features of the invention are the movability of the topplate A2 within the skeleton body, the-use of fireproof curtains to lcontact with the pavement below the edgesl of the body, the pivoting of theburners to' i direct the llame upwardly and downwardlyfrom the planeofthe llame-box, and the as bestes blanket applied over the whole flameboxto prevent radiation and to retain thev flame in the box when requiredby extending the blanket to the pavement. It is obvious tirata part ofthese improvementsmay bel pavement, the combination, with a liame-boxbody and'nieans for traversing it over 'the pavement, of curtains offlexible material -v applied to its sides to contact with the nnevensurface ofthe pavement and thereby confine the flame, substantially asherein set forth. V

2. In an apparatus for applying flame to a pavement, the combination,with a supporting-axle having wheels upon its ends, of .a llame-box bodysustained by the axle above the pavement, and flreproof curtains appliedAto the sides ofl the box to contact with the uneven surface of thepavement and thereby confine the llame, substantially as herein setforth.

3. An apparatus for applying flame to a pavement, comprising asupporting-axle with wheels at the ends, a flame-box body attached tothe axle, and a top secured movably within the body, substantially asherein set forth.

4. An apparatus for applying flame to a pavement, comprising asupporting-axle with wheels at the ends, a llame-box body attached tothe axle and sustained thereby above the pavement, a top secured movablywithin the'body, and ireproof curtains projected below the bottom of thebody to contactwith the uneven surface of thepavement substantially andthereby confine the flame, as herein set forth.

5. An apparatusfor applying flame to a pavement, comprising asupportingf'axle with wheels at the ends, a flame-,box body formed" ofvertical sides with stiifening-ilange at the top, a top plate securedadj nstably withinthe body, and lireproof curtains projected below thebottom of the body, as and forthe purpose set forth. e

6. In an apparatus 'for applying flame to a pavement, the combination,with a flame-.box bod y sustained above the pavement, and provided withsupporting-pins, of asbestos curtains having two or more sets of holesadapted to lit the pins so as to project the curtain l a greater or lessdegree below the body, substautiallyas herein set forth.

7. In an apparatus for applying flame to a pavement, the combination,with a flame-box and a liquid-fuel reservoir, of means of sus-A tainingthe box above 'the pavementtand a series of liquid-fuel b rners hingedat the rear end of the box to. e inclined above or below the plane ofthe boX,and-suitable connectious. between the burners and reservoir, asand for the purpose set forth. l I

8. In an apparatus for-applying llame to a pavement, the combination,with a llame-box and a liquid-fuel reservoir, of means for sustainingthe box above the pavement, a pipe swiveled horizontally upon the rearend of the llame-box and connected with the liquid-fuel reservoir, andaseries of liquid-fuel burners attached to such pipe,whereby the llamemay be directed above or below thev plane of the box, as and for thepurpose set forth.

9. The combination, with an apparatus ICO ` 5 set forth.

having a `alne-box with burners for applying heat to a pavement, of anasbestos blanket applied to the top and sides of the ameebox to preventradiation, substantially as herein 10. TheV combination, with anapparatus having a flame-box with burners for applying heat to apavement, of an asbestos blanket applied removably to the top andrsidesof the lo flame-box and als`to the adjacent pavement,

to confine thailame and also to prevent ra* dation, as and forthepurpose set forth.

In testimony whereof I have hereunto set my handuin the presence` of twosubscribing witnesses.

- ROBERT NASTEVENSa Vlitnessesff 4)IL/LEE, THOMAS S. CRANE,

